Wii U publication Wii U Daily is reporting that the specifications behind Wii U are extremely similar to those found in the Xbox 360. The publication claims it obtained the information from a Japanese developer who is currently working on porting a PlayStation 3 game to the Wii U. Nintendo themselves have yet to confirm Wii U specifications.
Quad Core, 3 GHz PowerPC-based 45nm CPU, very similar to the Xbox 360 chip.
768 MB of DRAM “embedded” with the CPU, and shared between CPU and GPU
Unknown, 40nm ATI-based GPU